Light-signal for elevators.



J. M. GRAHAM.

LIGHT SIGNAL FOR ELEVATORS.

APPLICATION FILED JULY 22, 1901.

907,339., Patented Dec.22,1908.

05% 051% 05% 05% 0 05% v 05% 0%% 0s% 0s% 0 i 0P% 3 0 02% 0%% 4 0%% 051% 05% 05% 01% 0 UNITED STATES PATENT OFFICE. I

JAiiEs MONROE GRAHAM, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO

ELEVATOR sUPPLY AND REPAIR COMPANY, A CORPORATION F ILLINOIS.

LIGHT-SIGNAL FOR ELEVATORS.

No. air/3339.

' Specification of Letters Patent.

Patented Dec. 22, 1908.

To all whom it may concern:

Be it known that I, JAMEs MONROE GRA- HAM, citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Light- Signals for Elevators, of which the following is a specification.

My invention relates to an elevator signaling apparatus, and my object is to provide a construction by which an intending pas-' senger waiting at a floor may signal a car .to stop and be informed which car is approaching him in the direction he wishes to go. In such patents as Armstrong 499,411, Smalley & Reiners 634,220, and others, the up and down lights on the floors are arranged in front of each shaft, but the passenger must keep watch of them all, and, in cases where the shafts are arranged" on Opposite sides of the hallway or in a long line, for exam le, he often loses a car because he has not 0 served the signal and consequently has not resented himself at the roper shaft in time for the o erator to see im.

In my invention I ave provided up and down passengers controllers, such as push-buttons, located on each floor, and up and down indicators at each floor for each. car, said indicators being grouped close together and adjacent said pushbut-' tons, said indicators being arranged corre spondin ly to the location of the cars, and preferaby numbered to correspond therewith, so that the intending'passenger need not watch all the shafts but merely the anel of indicators, and when a signal is disp aycd he will at once see it.

I have shown in connection with my invention the electro-magnetic signaling mechanism invented by John D. Bowne of New York, and set forth in the United States patent issued April 16, 1907, No. 850,618,

ut any other suitable signaling apparatusmaI.y be substituted n the drawings any floors of the building are referred to by numerals 1, 2 and 3, and

the two elevators shown are designated 4 of travel.

and 5. Slides 6 and 7 arranged in guides 8 and 9 are operated by suitable machinery in correspondence with the movements of the passenger cars, at reduced distance and speed Each car is rovided with a cutout switch 10 and car-s1gnal light 11.

-At some readily observed position near the elevator shafts on each floor is placed a case 12, which contains an up pushbutton 13-, and a down pushbutton 14, and a series of white lights 15 used to represent the ascending cars, and a like series of colored lights 16 that indicate the descending cars. Each pair of lights comprising one white and one colored light. is numbered in correspondence with one of the passenger cars, which bears the-same number at its shaft entrance, and on the car also if necessary.

Considering the drawin it is assumed that a passenger has pressed t e up pushbutton'and that car 5, also designateo bythe Roman numerals II, has taken the signal, Under those circumstances the slide 7 has made connectionwith the contact 17 and the fork 18 of the signaling mechanlsm hasthat is to say, before the passenger car has reached the floor, the circuit through the conductors 21 and 22 is also completed and the elevator light 11 set glowing. Thus, the intending passengerflafter pushing the button sees directly in front of him a light informing him of the car he is to take, and the conductor is signaled to stop. The two signals, one' to the intending passenger and one to the conductor, are given before the car reaches the signaling floor, and sufficient time is allowed for the erson to step to the proper shaft, and for t e conductor to conveniently bring his car to a stop.

If the person desired to go downwardly, he or she would press the down-signal pushbutton in the case 12, and the car 4 would take the signal at the contact 23, completing the circuit through the conductors 24 and 25, and dropping the fork 26. The result would be to complete the circuit through the conductors 27 and 28, lighting the first colored light in the lowest casel2. The car-light circuit would also be completed through the conductors 29 and 30, and the operation would be the same as explained for the up signal. Obviously, any number of elevators may be introduced and provided with indicating lights in the casings 12 Having now described my invention and explained the mode of its'operation, what 1 claim is* l 1. y In light signals for elevators, the combiand signal lights, su

- bination with a nation with a plurality of elevators provided with car lights, of u and down signal .pushbuttons'psignal iights representing ascendingyand descending elevators and arranged in order adjacent to the said pushbuttons, and signaling means having circuits including the said pushbuttons, car lights stantially as described.

2. In light signals for elevators, the combination with a plurality of elevators provided with car lights, of up and down signal pushbuttons, pairs of ditlerent colored signal li hts representing ascending and descending elevators and arranged in order adjacent to the said pushbuttons, and signaling means having circuits including the said pushbuttons, car lights and signal lights, substantially as described.

3. In light signals for elevators, the combination with a plurality of elevators provided with car lights, of up and down signal pushbuttons, signal ights representmg ascending and descending elevators and.

arranged in order adjacent to the said pushbuttons, and signaling means constructed and arranged whereby the operation of a pushbutton enables the nearest car moving in the desired direction to take the signal, having circuits including the said. push-buttons, ear lights and signal lights, substantially as described.

4. In light signals for elevators, the comlurality of elevators provided with car ligiits, of a single pair of push buttons for each 'iloor compiisingan up-signal and a dowinsignal pushbutton, signal lights representing the ascending and descending elevators and arranged in order adjacent to the said pushbuttons, and signaling means having circuits including the said car lights, pushbuttons, and signal lights.

5. In a signaling ap aratus forelevators,

in combination a plura ity of cars and floors 3 on any floor only when a passengerscoi1 troller on' said floor has been operated and the car is approaching that floor in. the direction corresponding to the controller operated;

6. In a signaling ap aratus for elevators, in combination a plura ity of cars and floors each floor being provided with an up and "down passenger"s-controll'er and up and down electrically-operated indicators for each car, each adapted to indicate one di rection of movement of that car, said indicaters being arranged close together and ad jacent said passengers-controllers, means for operating the indicators comprising said passengers-controllers and a commutator for each car operated correspondingly to the movement of its car adapted to operate its ears indicator on any floor only when a passengers-eontroller on said floor has been op- I erated and the car is approaching that floor in the direction corresponding to the controller operated.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES MON'IXOE GRAHAM. witnesses EDWARD E. LIVINGSTON, JEANNETTE C. HARVEY. 

